body { 
    background-size: 100%;
    background-repeat: no-repeat;
}


@media screen and (min-width: 960px) {
    /*PC端*/
    .choose_box {
        width: 1200px;
        margin: 0 auto;
        margin-top: 10%;
        text-align: center;
        overflow: hidden;
    }

    .plat {
        width: 400px;
        height:195px;
        text-align: center;
        float: left;
    }
        .plat img {
            width: 345px;
            height: 150px;
            text-align: center;
        }
    .plat-title {
        margin-left: 26px;
        text-align: left;
    }


}


@media screen and (max-width: 960px) {
    /*手机端*/
    .choose_box {
        width: 100%;
        margin: 0 auto; 
        text-align: center;
        overflow: hidden;
    }

        .choose_box img {
            width: 100%;
        }

    .plat {
        width: 85%;
        text-align: center;
        margin: 5% auto; 
    }

        .plat img {
            width: 100%;
            text-align: center;
        }
}

.plat-title {
    position: absolute;
    padding: 45px 40px;
    color: #fff;
    font-size: 16px;
    text-align: left;
}
    .plat-title span {
        font-size: 12px;
        margin-top:10px;
        display:inline-block;
    }
.noEvent { /*不可点击事件*/
    pointer-events: none;
}